# Service bulletin 23\-01\-036H

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10237179
- Published by NHTSA: 2023\-06\-02
- Manufacturer's number: 23\-01\-036H
- Manufacturer's date: 2023\-05\-04
- NHTSA component: PARKING BRAKE

## NHTSA's summary

Some Elantra \(CN7A\), Sonata \(DN8A\) and Santa Fe \(TMA\) vehicles may exhibit the Electronic Parking Brake \(EPB\) warning light on due to brake fluid entering the HECU electrical connector. DTC C1501 \(EPB Switch Failure\) may be present, but EPB performance remains unaffected. This bulletin describes the procedure to inspect, and if necessary, replace the Hydraulic Electronic Control Unit \(HECU\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237179-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237179-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes, Parking brake

## Trouble codes named

C1501

## Vehicles listed

- 2022 HYUNDAI ELANTRA
- 2022 HYUNDAI SANTA FE
- 2022 HYUNDAI SONATA

## Other bulletins for the same vehicles and component

- [23\-01\-036H\-1](/bulletins/10238346.md), 2023-06-30, Service bulletin: PARKING BRAKE. Certain Hyundai Elantra, Sonata, and Santa Fe vehicles may exhibit the Electronic Parking Brake \(EPB\) warning light on due to brake fluid entering the HECU \(Hydraulic Electronic Control Unit\) electrical connector. DTC C1501 \(EPB Switch Failure\) may be present, but EPB performance remains unaffected.
- [23\-01\-036H\-1](/bulletins/10238340.md), 2023-06-30, Service bulletin: PARKING BRAKE. Some Elantra \(CN7A\), Sonata \(DN8A\) and Santa Fe \(TMA\) vehicles may exhibit the Electronic Parking Brake \(EPB\) warning light on due to brake fluid entering the HECU electrical connector. DTC C1501 \(EPB Switch Failure\) may be present, but EPB performance remains unaffected. This bulletin describes the procedure to inspect, and if necessary, replace the Hydraulic Electronic Control Unit \(HECU\).

JSON: [/v1/bulletins/10237179](/v1/bulletins/10237179)

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